Pulley-grinding machine



.E. F.'CEAWFORD,

PULLEY GRINDING MACHINE.

APPLICATION FILED SEPT. 20, 1920.

Patanta' NW. 1, W22

5 SHEETSSHEET I.

J. F. CRAWFORD.

PULLEY GRINDING MACHINE.

APPLICATION man SEPT. 20, 1920.

Patented Nov 7, 1922 5 SHEETSSHEE1Z.

Twin/65$ v J. F. CRAWFORD.

PULLEY GRINDING MACHINE. APPLICATION FlLED SEPT. 20. 1920.

1.43.4,592, Patented Nov. 7, 1922,

5 SHEETS-SHEET 3.

. frwamfar' 500M055. dzzmjww rd J. F. CRAWFORD.

PULLEY GRINDING MACHINE.

APPLICATION FILED SEPT. 20, 1920.

,434,592, Patented NOV. 7, 1922;

5 SHEETS-SHEET 4.

172067115? Q Jrvfflaqufi Maw/655.

s. F. CRAWFORD.

PULLEY GRINDING MACHINE.

APPLICATION HLED SEPT. 20, 1920.

um A! m @w Patented Nov. 7, 1922.

omrso STATES PATENT OFFICE.

JOHN F. CRAWFORD, OF RACINE, WISCONSIN, ASSIGNOR T0 J. I. CASE THRESHING MACHINE COMPANY, OF RACINE, WISCONSIN, A CORPORATION.

PULLEY-GRINDING MACHINE.

Application filed September 20, 1920. Serial No. 411,555.

To aZZ who mt may concern Be it known that I, JoHN CRAWFORD, a citizen of the United States, residing at Racine, in the county of Racine and State of Wisconsin, have invented certain new and useful Improvements in Pulley-Grinding Machines, of which the following is a specification.

The object of my invention is to provide a machine for quickly and accurately grinding pulleys, and by which the pulley face may be provided with a true and uniform surface in its entirety, and have a crown forma tion of any desired degree of radius. It will be understood that the item of'properly facing pulleys is an important and expensive one in establishments producing large quantities of various types of machinery, such as agricultural machines, tractors and the like, requiring pulleys of different sizes both in the diameter of the wheel and the face thereof, and, so far as I am aware, such work has generally been performed by slow and expensive methods. My improved machine is especially designed for performing such work and is so arranged and operates as to be under convenient control of an attendant in installing pulleys thereon and adjusting the same for the desired grinding or facing, all as will be hereinafter more particularly pointed out and claimed.

I11 the accompanying drawings, forming part hereof, Figure 1 is a front elevation of my improved pulley grinder; F ig. 2, a plan; Fig. 3, a transverse vertical sectional view taken on the dotted line 3-3 in Fig. 1; Fig. 4, an end elevation of the machine; Fig. 5, a front elevation of the grinding wheel which I employ; Fig. 6, a plan of. the same with parts in sec-tion; Fig. 7, a horizontal sectional view through the machine showing the flexible shaft and associated mechanisms which I employ; and Fig. 8 is a detail view of said shaft.

In said drawings the portions marked, 10, indicate the frame of my machine, which is supported upon suitable legs, as 1.1. sen frame 10 embodies or is provided with a guide-way, 12, upon which is mounted a table, 13, having slide-ways, 14, at its sides upon which is fitted a carrier, 15, provided with guide-ways, 16, mating with said slideways 14, said carrier 15 having a flange, 17, in which is mounted an operating screw, 18,

.the latter being screw-threaded into table 13, as indicated in Fig. 3, and provided with a hand-wheel, 19. for adjusting said screwshaft to move carrier 15 back and forth transversely of the machine. Upon said carrier 15 I place a rotary disk, 20, having a peripheral flange, as 20, which overlaps a seat, 21, forming part of the carrier and between which seat and disk anti-friction bearings, 22, are interposed.

Frame 10 has a slotted portion, 23, therein over which said table 13 is positioned, and by which I am enabled to secure to carrier 15 a compound shaft and gear-bearing, 25, connected to carrier 15 by bolts, 26, or otherwise. In said bearing 25 is a vertical shaft, 27, splined, at 28, to disk 20, and the upper end of which is screw-threaded to receive a spindle, 29. Also mounted at the upper end of said shaft 27 is a pulley adapter, 30, fitting between said shaft and an enlarged portion, 29, of said spindle 29. Upon said adapter 30 the pulley, 32, to be ground or finished, is fitted, and is held from vertical movement by a suitable key, 33. At the lower end of shaft 27 is keyed or otherwise secured a gear, 35, which is encased in the lower chamber, 25, of shaft-bearing 25, the lower side of which chamber is closed by a detachable bottom, 25, and which chamber is thus capable of containing lubricating oil. Meshing with said gear 35 and housed in chamber 25' is a worm, 36, mounted upon a flexible shaft comprising the section, 37, con nected to a telescope section, 38, by a universal joint, 39, and in which section 38 is a telescoping section, 40, connected by a im1- versal joint, 41, to a section, 42, upon which latter is mounted a gear, 43, adapted to be driven, from any source of power, by a pulley, 44, which in turn drives gears, 45, 46, which communicate with said worm 43.

Upon frame 10 is secured a supplemental frame, 50, for supporting shaft, 51, which is preferably mounted in housed bearings, as 52, 53, and which is driven by a pulley and belt, 54, 55, as indicated in Fig. 1. At one end of said shaft'51 is secured a grinding or polishing instrumentality of any preferred form, that illustrated being an emery ring, 56, secured within a holder, 57, but which being of a well known commercial form need not further be specifically described herein.

Upon table I secure a rack-bar 60, by means of a screw-bolt, 61, or otherwise, with by the adjusting-screw Tel,

which rack-bar a pinion, 62, meshes, said pinion being mounted at the end of shaft 63 forming part of hand operating wheel, 65, said rack and pinion being enclosed within a suitable closure, as 66.

In said table 13 I mount a manually operated clamp, 70, having a flanged gripping jaw, 71, extending under a rail, 72, havlng an offset portion, 73, within which said clamp is fitted, the latter being capable of adjusti'uent against :or away from said rail secured to handwheel, 75, and by which clamp, table 13 may be secured in locked position during the'operation of the machine.

It will thus be seen that my improved pulley grinding machine is capable of a variety of adjustments to accommodate many different sizes of pulleys in proper relation to the grinder 56, to be faced and finished thereby, and its operation is as follows:

As indicated in 'Fig. 3, an adapter of proper length is mounted upon shaft 27 and a pulley 32'secured thereon in the manner described. The clamp is released from rail 72 by manipulating hand-wheel 75, when table 13 is free to travel longitudinally of the machine by operating handwheel 65, which causes pinion 62 to rotate upon rack 60, and thus move said table in the direction desired. The pulley is then brought into proper relative contact with grinder 56 by adjusting screw 18 through hand-wheel 19, which causes carrier 15 to travel transversely of the machine as desired. It will be understood, of course, that in such adjustments of both table 13 and carrier 15 with the shaft'27 and parts carried thereby, movement of said table longitudinally of the machine is permitted through the telescoping shaft sections 38, 40, and that the transverse movement of said carrier is accomplished by the flexibility of said shaft through the instrumentality of the universal joints heretofore described. WVhen pulley 32 is properly positioned in relation to grinder 56, and shaft 51 is rotating, pulley 32 is set in rotary motion by the shaft 27 which is driven by its gear 35 through the flexible shaft 38 from the pulley 44 and driving gears communieating therewith, as indicated in Fig. .4, and as hereinbefore described. By'thus being enabled to adjust the pulley 32 at will in relation to the inner wall of grinder 56 the face of said pulley may be dressed or finished to the degree of curvature, orotherwise, as may be predetermined; and by such wide-range of adjustment of the pulley carrier I am enabledto face oroperate upon pulleys of'small diameter and with narrow or broad faces,'as well as pulleys of large diameters and variedsized faces, so long as such pulley face comes vwithin the confines of the inner wall of a grinder such as that illustrated, the proportionate limit of such large-sized pulley being indicated by the diagrammatic circular line 7 6 in Fig. 2.

I claim as my invention:

1. In a machine for grinding pulleys, a frame, a movable table mounted thereon, a movable carrier mounted upon said table, a pulley grinding element, means for rotating the same, a shaft extending through said carrier and adapted to support a pulley, means for rotating said shaft, means for adjusting said table to position said pulley in relation to said grinding element, means for. adjustingsaid carrier in diametric relation to said grinding element, and means for locking said table for fixedly securing said pulley in contact with said grindingelement.

2. Ina pulley grinding machine, a frame, a table adjustable longitudinally therealong, a carrier mounted upon said table and adjustable transversely thereof, a rotatable disk mounted upon'said carrier, a shaft extending through said carrier and disk, an adjustable adapter at one end of said shaft, a spindle in said adapter for supporting a pulley, and flexible means at the opposite end of said shaft for driving the same and said disk.

3. In a pulley grinding machine, a frame having a guide-way thereon, a table mounted upon said guide-way, a rack-bar secured to said frame, means cooperating with said rack-bar for propelling said table therealong, a pulley carrier adjustably mounted upon said table, means for grinding a pulley, and means engaging said rack-bar for moving said table along said guide-way to position a pulley in relation to said grinding means.

4. In a pulley grinding machine, a frame, a table movably mounted thereon, means for moving said table, means for locking said table to said frame, a carrier movably mounted in said table, means for actuating said carrier, a shaft mounted in said carrier, pulley supporting means mounted on said shaft, a grinding element adjacent thereto, means at the opposite end of said shaft for rotating the same, and flexible means engaging said rotating means for driving the same and said shaft.

5. In a pulley grinding machine, the combination of a frame, a grinding element supported thereon, means for actuating the same, a table movable longitudinally along said frame, a pulley carrier arrangedtransversely of and :movably mounted thereon, means for-adjusting said table in relation to said grinding element, means for adjusting said carrier in relation-lo said grinding ele ment,a shaft supported in said carrier, flexible means for rotating said shaft, means on said shaft for supporting a pulley to be ground, and an adapter on said shaft for adjusting such pulley in relation to said grinding element. I

6. In a pulley grinding machine, the combination, with a table having slide-Ways, a carrier mounted and transversely movable thereon and having guide-Ways fitted to said slide-Ways, a shaft-bearing secured to said carrier, a shaft mounted in said hearing, a gear at the lower end of said shaft, a chamber associated With said bearing for housing said gear, means for adjusting said carrier along said slide-Ways, and flexible means engaging said gear for actuating the same to permit movement of said carrier when actuated by said adjusting means.

7. In a pulley grinding machine, a frame, a table mounted thereon, means for moving said table longitudinally of said frame, a carrier on said table, means for moving said carrier transversely of said table, a pulley supporting shaft mounted in said carrier, a

gear mounted on said shaft for rotating the same, and a flexible shaft engaging said gear for driving the same, said flexible shaft being longitudinally extensible and retractible and horizontally and vertically movable to accommodate it to the longitudinal and transverse movements of said table and carrier.

8. In a grinding machine, a shaft, a grinder thereon, a movably mounted table adjacent said grinder, a slidable carrier on said table, a shaft mounted in said carrier, means on said shaft for supporting a pulley to be ground, means for adjusting said carrier to position said pulley in relation to said grinder, means for adjusting said table to engage said pulley With said grinder and disengage the same therefrom, and means for lockin said table to retain said pulley in fixed position.

9. In a pulley grinding machine, a carrier adapted to be moved transversely thereof, a disk mounted on said carrier, a shaft ex tending through said carrier and disk and secured to the latter to rotate the same, a

spindle mounted in the end of said shaft for supporting a pulley, an adapter on said shaft, and means for driving said shaft to rotate said disk, spindle and adapter.

10. In a pulley grinding machine, a grinder, means for actuating the same, a carrier adaptedtobe moved in both transverse and longitudinal directions in diametric horizontal relation to said grinder, a pulley support mounted in said carrier, means for adjusting said carrier to position said pulley support in relation to said grinder, and means for rotating said pulley support. 11. In apulley grinding machine, a grinder, a carrier upon said machine movable transversely thereof in relation to said grinder, a pulley support mounted therein, a gear at the lower end of said support, a flexible shaft, a Worm on said shaft engaging said gear, and means for driving said shaft to rotate said pulley support and permit its adjustment in relation to said grinder.

12. In a pulley grinding machine, a frame, a table movably mounted thereon, means for moving said table, means for locking said table in fixed position, a carrier mounted on said table and adjustable in transverse relation thereto, means for adjusting said carrier, a disk mounted on said carrier, a bearing secured. thereto, a shaft extending through said bearing and disk, a pulley adapter at the upper end of saidshaft, driving means secured to the opposite end of said shaft, a flexible shaft engaging said driving means, and means for rotating said flexible shaft to actuate said driving means.

13. In a pulley grinding machine, a grinder, a vertical shaft, a spindle thereon adapted to receive a pulley, means on said shaft for adjusting a pulley in relation to said grinder, means for supporting said shaft and movable therewith, and a flexible shaft engaging said vertical shaft for rotating the same.

In testimony whereof I aflix my signature.

JOHN F. CRAWFORD. 

